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28.8EFX

ASPEN TECHNOLOGIES, INC.

28.8EFX

Modem Type

Data (synchronous/asynchronous)/Fax

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

External

Fax Class

Class I & II

Data Modulation Protocol

Bell 103A/212A

ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34

Rockwell V.FC

Fax Modulation Protocol

ITU-T V.17, V.21CH2, V.27ter, V.29

Error Correction/Compression

MNP5, V.42, V.42bis

CONNECTIONS

Purpose

Location

Purpose

Location

Line out

CN1

DC power

CN4

Line in

CN2

Power switch

SW1

RS-232/422

CN3

   

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

MR

Red

On

Power is on

MR

Red

Off

Power is off

TR

Red

On

DTR signal is high

TR

Red

Off

DTR signal is low

SD

Red

Blinking

Modem is transmitting data

SD

Red

Off

Modem is not transmitting data

RD

Red

Blinking

Modem is receiving data

RD

Red

Off

Modem is not receiving data

OH

Red

On

Modem is off-hook

OH

Red

Off

Modem is on-hook

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

AA

Red

On

Auto-answer enabled

AA

Red

Off

Auto-answer disabled

AA

Red

Blinking

Phone is ringing

HS

Red

Blinking

Modem is in test mode or detected an error

HS

Red

On

Modem is operating at 9600bps or faster

HS

Red

Off

Modem is not operating faster than 9600bps

Proprietary AT Command Set

See document V1535 for a full command summary.